Method of arc welding



June 16, 193.1. H, 1 BURNlsH 1,810,005

METHOD OF ARC WELDING Filed Nov. 29, 1929 Patented June 16, 1'931 UNITED *ST'.x'frEsf PATENT OFFICE nowm J. Bomen, or mwAUIEE; wisconsin, AssIGNoa To a. o. sm'rn coarona'rroN, or MILWAUKEE-wisconsin.; conroaa'rIoN or NEW Yom:

muon oirv anc wnmnim Application nled November 29, '1929.' Serial No. 410,479.

This invention relates to a method of arc welding and has particular relation to the. preliminary tack welding of abutting edges of sheets to be welded.

An object of the' invention is to. provide a method of tack welding which allows a substantially uniform susequent welding opera ation.

A further object is to provide a method i of arc welding which will produce a weld of uniform quality.

The invention resides in providing ra plurality of recesses or openings at s' acedintervals along the seam to bewel ed, for receiving the deposited tack Welding metal.

The invention may be more rea ily lunderstood by reference to the accompanying drawings in which:

Figure 1 is a plan view of the abutting edges in position for welding. l

Fig. 2 1s a plan view of a completed tack weld between the edges showing a portion of the edges welded. Y

Fig. 3 is a section on line 3-3 of Fig. 1.

Fig. 4 is a section on line 4-4 of Fig. 2.

Iiig. 5 is a transverse section of the finished we 4 The sheets 1 and 2 have their edges to be welded chamfered t0 form lips 3 and 4 which meet in abutting relation and provide a welding groove 5 above the lips 3 and 4. The abutting lips 3 and 4 have a plurality of openings or recesses 6 at spaced intervals therein. 2

In carrying out the invention, a chill member 7 is placed beneath each recess or open? ing 6. The sheets 1 and 2 are then tack welded together b striking an arc between the sheets and a usible metallic weldrod`8 and filling the openings or recesses 6 with welding metal 9 deposited by means of the arc from the weldrod 8.

In the subsequent welding operation an arc is struck between the lips 3 and 4 at-the bottom of the welding groove 5 and a fusible metallic weldrod 10, and a suilicient number of passes are made along the oove 5 to fill it with molten welding meta 11 andcomplete the weld.

lThe tack welds 9 do not interfere with the passage of the weldrod 10 or the welding arc along the Welding groove 5 since the welding metal of the tack welds does not extend apreciably abovev the level of the upper suraces of the lips 3 and 4 and therefore the weldrod 10 will require aminimum of regulation in feed and a more uniform weld will be produced.

The invention may have various modification within the scope-of the claims.

I claim: l

1. In arc welding, the steps which comprise providingr recessesin the metal to be welded at spaced intervals along the abutting edges .of the -seam and filling said recesses w1th welding metal to tack the metal to be welded in position for final welding.

2. rlhe method of arc Welding the edges of abutting sheets of metal which comprises providing recesses in the metal of the edges at spaced intervals along the seam to be Welded, tack Welding the sheets by iilling said recesses with welding metal, and thereafter passing l an electric arc along the-seam to weld the same.

3. The method of arc welding metal which comprises chamfering the abutting ed es and providing recesses therein at space inter vals alon the seam to be welded, tack welding the s eets by filling said recesses with welding metal, and thereafter passing an arc along the seam to weld the same. v

4. The method of arc welding which comprises chamfering the abutting edges to be welded to form a welding groove closed at the bottom by lips of reduced thickness, providing recesses 1n the lips at intervals along the seam, tack welding the sheets by filling said recesses with welding metal substantially flush with the upper surfaces of said lips,v and thereafter depositing Welding metal in said Welding groove to complete the weld.

5. The method of are Welding the edges of abutting sheets of metal which comprises providing recesses at intervals along the seam to be Welded, tack welding the sheets by depositing metal in said recesses substantially Hush with,y the upper surface of the metal to be Welded, and thereafter passing an arc' along the seam to Weld the same. In Witness whereof, I have hereunto signe my name at Milwaukee, Wisconsin, this 27th day of November, 1929.

HOWARD J. BURNISH. 

